A Triarthrus eatoni trilobite, order Ptychopariida, family Olenidae, 11 mm long, found in the Frankfort Shale, New York, USA, from the Upper Ordovician. Credit: Dwergenpaartje / Wikimedia / CC BY-SA 3 ...
"Trilobites hold the distinction of being among the world's first dominant forms of complex animal life, arthropods that rank second only to the hallowed dinosaur in terms of their paleontological ...
A rapid climate collapse during the Late Ordovician Mass Extinction devastated ocean life and reshuffled Earth’s ecosystems.
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